What is stated by the null hypothesis (H0) for an ANOVA?

Select one:

a.

At least one of the population means is different from another mean.

b.

The beta estimate is significant.

c.

All of the population means are different from each other.

d.

There are no differences between any of the population means.

The term correlation refers to a statistical technique that is used to ____.

Select one:

a.

measure the fit of a model

b.

measure and describe the linear relationship between two variables

c.

measure the significance of a variable

d.

measure the magnitude of a variable

The term expected frequencies refers to the frequencies ____.

Select one:

a.

found in the population being examined

b.

found in the sample dat

c.

that are hypothesized for the population being examined

d.

computed from the null hypothesis

An independent-measures research study uses two samples, each with n = 12 participants. If the data produce a t statistic of t = 2.08, then which of the following is the correct decision for a two-tailed hypothesis test?

Select one:

a.

Reject the null hypothesis with = .05 but fail to reject with = .01

b.

Reject the null hypothesis with either = .05 or = .01

c.

It cannot be answered without additional information.

d.

Fail to reject the null hypothesis with either = .05 or = .01

For which of the following correlations would the data points be most widely scattered around the regression line?

Select one:

a.

r = 0.80

b.

r = 0.50

c.

r = 0.99

d.

r = 0.10

In the general linear equation, Y = bX + a, what is the value of y if x = 1, b = 4, and a = - 1?

Select one:

a.

-3

b.

5

c.

3

d.

-5

The results from a research study indicate that adolescents who watch more violent content on television also tend to engage in more violent behavior than their peers. The correlation between amount of TV violent content and amount of violent behavior is an example of a ____.

Select one:

a.

correlation near zero

b.

positive correlation

c.

negative correlation

d.

correlation near one

What is the purpose for post tests?

Select one:

a.

to determine how much difference exists between the treatments

b.

to determine whether or not the sample is normally distributed

c.

to determine which treatments are significantly different

d.

to determine whether or not a Type I error was committed

Which of the following is a basic assumption for a chi-square hypothesis test?

Select one:

a.

The observations must be independent.

b.

The sample size is less than 30.

c.

The scores must come from an interval or ratio scale.

d.

The population distribution(s) must be normal.

What happens to the critical value for a chi-square test if the size of the sample is increased?

Select one:

a.

The critical value depends on the number of categories, not the sample size.

b.

The critical value decreases.

c.

The critical value is determined entirely by the alpha level.

d.

The critical value also increases.